dict1 = {}
print("=============")
dict2 = {'title':'Python入门教程', 'price':9.98, 'publish':'黑马程序员'}
print(dict2)
print(type(dict2))
print("=============")
print(dict2['title'])
print(dict2['price'])
print(dict2['publish'])
print("=============")
dict2['price'] = 6.69
print(dict2)
print("=============")
del dict2['publish']
print(dict2)
print("=============")
dict2.clear()
print(dict2)
